1982 & 1984 Corvette Engine Computer Module Swap Secret

C4 Corvette 1982 1984 Engine Computer Module Swap Secret

Shopping around for a 1982 Corvette Engine Computer Module (ECM) can be quite a hassle nowadays. Not to mention, when you do get lucky and find one they are outrageously expensive. Luckily, the crew at Corvette Salvage is about to let you in on a little unknown secret in the Corvette realm.

1984 Corvette ECM’s come in two variations: one for a manual transmission and one for an automatic transmission. Each module has an EPROM chip attached which acts as the “brain” for the computer. Because the brain of the computer is programmed a certain way, we have come to the following conclusion:

Any 1982 Corvette Engine Computer Module (ECM) can be replaced with an Engine Computer Module (ECM) from a 1984 Corvette with an AUTOMATIC TRANSMISSION. No REWIRING is necessary. It is strictly a plug and play setup!

NOTE: This is not to say that an ECM from a 1984 Corvette with a manual transmission can’t be used with a 1982 Corvette. It most certainly can. However, it would require removing the EPROM chip from the 1984 manual transmission computer module and replacing it with an EPROM chip from a 1984 automatic transmission computer module.

NOTE: If you do manage to use a 1984 computer module from a manual transmission Corvette in a 1982 Corvette, you will get a problem with a very high idle RPM.

At the end of the day, finding a 1984 Corvette automatic transmission ECM is easier and definitely cheaper. We have taken the time to do our research and we have linked both computer modules below. Take a look for yourself and let us know what you think.

GM Part Numbers for Engine Control Module’s associated with this article are as follows:

19821225550, 01225550
1984, Automatic Transmission88999109, 1226026, 01226026
1984, Manual Transmission1226430, 01226430